1,portmap配置失败原因答案
Ubuntu上默认是没有安装NFS服务器的,首先要安装NFS服务程序:
$ sudo apt-get installnfs-kernel-server
(安装nfs-kernel-server时,apt会自动安装nfs-common和 rpcbind(注意,选取这里是 rpcbind 而非portmap))这样,宿主机就相当于NFSServer。
(1)配置/etc/hosts.deny(禁止任何host(主机)能和你的NFS服务器进行NFS连接),加入:
### NFS DAEMONS
rpcbind:ALL
lockd:ALL
mountd:ALL
rquotad:ALL
statd:ALL
(2)配 置/etc/hosts.allow
允许那些你想要的主机和你的NFS服务器建立连接。下列步骤将允许任何IP地址以192.168.0开头的主机(连接到NFS服务器上),也可以指定特定的IP地址。加入:
### NFS DAEMONS
rpcbind: 192.168.0.
lockd: 192.168.0.
rquotad: 192.168.0.
mountd: 192.168.0.
statd: 192.168.0.
(3) 配置/etc/exports
NFS挂载目录及权限由/etc/exports文件定义
比如我要将将我的usr目录中的/usr/local目录让192.168.0.*的IP共享,则在该文件末尾添加下列语句:
/usr/local192.168.0.*(rw,sync,no_root_squash)
或者: /usr/local192.168.197.0/24(rw,sync,no_root_squash)
192.168.0.* 网段内的NFS客户端能够共享NFS服务器/usr/local目录内容.且有读,写权限,并且该用户进入/usr/local目录后的身份为root,最好加上sync, 否则 $ sudo exportfs-r 时会给出警告,sync是NFS的默认选项.
(运行$ showmount-e 查看NFSserver的exportlist.
若更改了/etc/exports, 运行 $ sudo exportfs-r 更新
运行 $ sudo/etc/init.d/nfs-kernel-server restart 重启nfs服务)
后续实验记录:
root@camel-dynabook-SS-1700MY-106S-2:~# mount -t nfs -o nolock 192.168.1.116:/home/camel/Mini2440-NFS /mnt
root@camel-dynabook-SS-1700MY-106S-2:~# cd /mnt
root@camel-dynabook-SS-1700MY-106S-2:/mnt# ls
bin etc lib mnt proc sbin sys usr www
dev home linuxrc opt root share tmp var
mini2440写入参数:
console=ttySAC0
root=/dev/nfs
nfsroot=192.168.1.116:/home/camel/Mini2440-NFS
ip=192.168.1.70:192.168.1.111:192.168.1.111:255.255.255.0:sbc2440.arm9.net:eth0:off
nand启动mini2440串口输出:
IP-Config: Complete:
device=eth0, addr=192.168.1.70, mask=255.255.255.0, gw=192.168.1.111,
host=sbc2440, domain=, nis-domain=arm9.net,
bootserver=192.168.1.111, rootserver=192.168.1.116, rootpath=
Looking up port of RPC 100003/2 on 192.168.1.116
eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
rpcbind: server 192.168.1.116 not responding, timed out
Root-NFS: Unable to get nfsd port number from server, using default
Looking up port of RPC 100005/1 on 192.168.1.116
rpcbind: server 192.168.1.116 not responding, timed out
Root-NFS: Unable to get mountd port number from server, using default
Root-NFS: Server returned error -5 while mounting /home/camel/Mini2440-NFS
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs" or unknown-block(2,0)
Please append a correct "root=" boot option; here are the available partitions:
1f00 256 mtdblock0one_wire_status: 4
(driver?)
1f01 128 mtdblock1 (driver?)
1f02 5120 mtdblock2 (driver?)
1f03 256640 mtdblock3 (driver?)
1f04 262144 mtdblock4 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
one_wire_status: 4
Backtrace:
[<c00341cc>] (dump_backtrace+0x0/0x10c) from [<c0329f3c>] (dump_stack+0x18/0x1c)
r7:c03dba08 r6:00008000 r5:c3923000 r4:c0481c90
[<c0329f24>] (dump_stack+0x0/0x1c) from [<c0329f8c>] (panic+0x4c/0x114)
one_wire_status: 4
[<c0329f40>] (panic+0x0/0x114) from [<c0008dbc>] (mount_block_root+0x174/0x228)
r3:c38583ec r2:00000000 r1:c3823f60 r0:c03db9a0
[<c0008c48>] (mount_block_root+0x0/0x228) from [<c0008f34>] (mount_root+0xc4/0xfc)
[<c0008e70>] (mount_root+0x0/0xfc) from [<c0009094>] (prepare_namespace+0x128/0x180)
r5:c002081d r4:c0481660
[<c0008f6c>] (prepare_namespace+0x0/0x180) from [<c00084b0>] (kernel_init+0xe0/0x114)
r5:c001f2e4 r4:c0481420
[<c00083d0>] (kernel_init+0x0/0x114) from [<c004bbbc>] (do_exit+0x0/0x620)
r5:00000000 r4:00000000
one_wire_status: 4
还有错误,革命尚未成功,同志仍需努力。
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